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Finding the Fourth Proportional to 528,087.40, 792,908.70 and 409,892.20

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Solution

The fourth proportional to 528,087.40, 792,908.70 and 409,892.20 is: 615,441.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,087.40 : 792,908.70 = 409,892.20 : x
  2. Step 2: Convert to fraction form
    528,087.40/792,908.70 = 409,892.20/x
  3. Step 3: Cross multiply
    528,087.40x = 792,908.70 × 409,892.20
  4. Step 4: Simplify right side
    528,087.40x = 325,007,091,442.14
  5. Step 5: Solve for x
    x = 325,007,091,442.14/528,087.40
  6. Step 6: Final answer
    x = 615,441.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.